<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="textml; charset=utf-8" />
<title></title>
<style>
#div1
{
	width:200px;
	height: 300px;
	border: 1px solid red;
	margin:0 auto;
    filter:alpha(opacity=30);
      opacity:0.3;
}
</style>
<script type="text/javascript">
     
	window.onload=function (){
     var oDiv=document.getElementById('div1');
     oDiv.onmouseover=function(){

     	movediv(100);
     }
     oDiv.onmouseout=function(){
     	movediv(30);
     }
	};
	 var alpha=30;
	var timer=null;
	function movediv(tag){
		var oDiv=document.getElementById('div1');
        clearInterval(timer);
        timer=setInterval(function (){
        	var speed=0;
        	if(alpha<tag)
        	{
        		speed=1;
        	}
        	else
        	{
        		speed=-1;
        	}
        	if(alpha==tag)
        	{
        		clearInterval(timer);
        	}
        	else
        	{
        		alpha+=speed;
        		oDiv.style.filter='alpha(opacity:'+alpha+')';
        		oDiv.style.opacity=alpha/100;
        	}
        },30);   
	};
</script>
</head>
<body>
<div id="div1">
<img src="./film/alalei.jpg" width="100%" />
</div>
</body>
</html>
